The motor mounts haven't been checked, as it doesn't shake at idle, or startup, or anything really, just once it's warmed up and at speed. It's something I can possibly have them look at today.

I'll inquire about opening up the case and diagnosing. The other thing I had considered was swapping out the case and eating the core deposit, then having someone rebuild this and then sell it to recover some of the cost of the replacement...

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• 2008 X5 3.0si Alpine White